Thumb ring



FIG. 1 is a perspective view of a thumb ring;

FIG. 2 is a front elevational view of the thumb ring of FIG. 1;

FIG. 3 is a rear elevational view of the thumb ring of FIG. 1;

FIG. 4 is a right side view of the thumb ring of FIG. 1;

FIG. 5 is a left side view of the thumb ring of FIG. 1;

FIG. 6 is a top plan view of the thumb ring of FIG. 1; and,

FIG. 7 is a bottom plan view of the thumb ring of FIG. 1. 

CLAIM The ornamental design for a thumb ring, as shown and described. 